129
Problem
Possible causes
Possible solution
Unable to connect
to the network
4G LTE nano-SIM card invalid.
Contact your service provider.
You are not within the network’s service
area.
Check the service area with your
service provider.
Poor signal.
Move to an open space, or if you are
inside a building, move closer to a
window.
Device crashes,
reboots, freeze, or
cannot be powered
on
Some third-party software is not
compatible with your device.
Reset the device to factory status.
Uninstall the software that may cause
the problem.
Upgrade the device software.